CN115621953A - Overhead conductor wide-frequency-domain vibration-proof device - Google Patents
Overhead conductor wide-frequency-domain vibration-proof device Download PDFInfo
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- CN115621953A CN115621953A CN202211268628.0A CN202211268628A CN115621953A CN 115621953 A CN115621953 A CN 115621953A CN 202211268628 A CN202211268628 A CN 202211268628A CN 115621953 A CN115621953 A CN 115621953A
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- vibration
- arm
- transmission shaft
- damper
- swing arm
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/14—Arrangements or devices for damping mechanical oscillations of lines, e.g. for reducing production of sound
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/05—Suspension arrangements or devices for electric cables or lines
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/05—Suspension arrangements or devices for electric cables or lines
- H02G7/053—Suspension clamps and clips for electric overhead lines not suspended to a supporting wire
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- Suspension Of Electric Lines Or Cables (AREA)
Abstract
An overhead wire wide frequency domain vibration preventing device, the device comprising: one end with the fixed arm that the air wire is connected, with the fixed arm other end is connected and with air wire vertically transmission shaft, through the shaft hole with a plurality of different weight's of transmission shaft vibration swing arm and set up in the attenuator between vibration swing arm and the transmission shaft. The vibration energy of the overhead conductor is transmitted to the transmission shaft through the fixed arm, so that the collection and the introduction of the vibration energy are realized; vibration energy is transmitted to the vibration swing arms with different weights through the transmission shaft, so that the vibration energy is divided; the vibration energy absorption efficiency is improved through resonance by adapting to different vibration frequencies through a plurality of vibration swing arms with different weights; the damper is used for absorbing vibration energy, so that the purposes of vibration elimination and vibration prevention are achieved, and finally the vibration prevention problem of the power transmission line caused by unconventional vibration and daily breeze vibration in the repeated ice environment is effectively solved.
Description
Technical Field
The invention belongs to the field of power transmission equipment, and particularly relates to an overhead conductor wide-frequency-domain anti-vibration device.
Background
The wind-induced vibration of the overhead transmission line seriously threatens the safe and stable operation of a power grid, and long-time breeze vibration can cause the abrasion of the transmission line and fixed facilities thereof, and even cause the fatigue fracture of the transmission line in serious conditions, thereby threatening the safe operation of the transmission line. Therefore, effective measures must be taken to prevent the wire from being vibrated by the breeze.
The breeze vibration of the overhead conductor is the vibration of the overhead conductor caused by gusts, the vibration mainly occurs in the vertical direction of the line, the vibration frequency is 3-120 Hz, and the amplitude is multiple times of the diameter size of the overhead conductor. The wind speed causing such vibration is generally in the range of 0.5 to 10m/s, and is called breeze vibration. The breeze vibration exceeding the allowable amplitude (for example, the diameter of the overhead line is more than five times) easily causes the phenomena of fatigue strand breakage of the overhead line, abrasion or fatigue damage of hardware fittings and tower components, and the like, even causes the line breakage accident of the overhead line, and seriously threatens the safe operation of the power transmission line.
The existing vibration-proof device is a vibration-proof component which is specially installed on a lead to prevent the lead from fatigue and strand breakage caused by breeze vibration. Most vibration-proof devices are designed to reduce the vibration amplitude of the wires by converting vibration energy into heat energy (e.g., using a damper, a damper wire, a damper whip, etc.) or sound energy to dissipate. There are also some vibration-proof devices that achieve vibration-proof by increasing the stiffness of the wires (e.g., using a wire guard) or improving the damping effect of the wires. At present, the existing vibration-proof measures cannot be directly applied to extreme environmental conditions, for example, in recent years, vibration of a line in a repeatedly iced area is reduced by arranging a damper steel strand on the line, however, the damper steel strand is deformed in the process of ice-shedding jump due to the change of the line vibration frequency after ice-coating and the fact that the vibration frequency of ice-shedding jump is far from the frequency of normal wind-induced vibration. The method provides a difficult problem for the design, operation and maintenance of the anti-vibration measures of the transmission line engineering in the repeated ice-icing environment.
Disclosure of Invention
The invention aims to solve the problem of vibration prevention of a power transmission line caused by unconventional vibration and daily breeze vibration in a repeated ice environment.
The purpose of the invention is realized by adopting the following technical scheme:
an overhead wire wide frequency domain vibration isolation device, comprising: the device comprises a fixed arm, a transmission shaft, a plurality of vibration swing arms with different weights and a damper; one end of the fixed arm is used for clamping an overhead conductor, and the other end of the fixed arm is connected with the transmission shaft; each vibration swing arm in the plurality of vibration swing arms with different weights is provided with a shaft hole, and each vibration swing arm in the plurality of vibration swing arms with different weights is movably sleeved on the transmission shaft through the shaft hole; the damper is arranged between the vibration swing arm and the transmission shaft.
Preferably, a plurality of positioning protrusions arranged at intervals are arranged on the surface of the shaft side of the transmission shaft; the positioning bulge is used for fixing the positioning bulge of the damper.
Preferably, a plurality of positioning grooves for fixing the damper are circumferentially distributed on the inner side of the shaft hole, and the positioning grooves and two adjacent positioning protrusions on the transmission shaft jointly form a space for accommodating and fixing the damper.
Preferably, the damper is an elastic cylinder which is in limit contact with the vibration swing arm and the transmission shaft respectively.
Preferably, the vibrating swing arm is fixed with the tup in its one end of keeping away from the shaft hole, and the tup of every vibrating swing arm is different in each vibrating swing arm.
Preferably, one end of the fixing arm is provided with a wire clamp structure for fixing an overhead conductor, and the wire clamp structure comprises a semicircular groove at the end of the fixing arm, a wire clamp cover plate with the same semicircular groove and a wire clamp bolt for locking the end of the fixing arm and the wire clamp cover plate; the semicircular groove at the end part of the fixing arm and the wire clamp cover plate with the same semicircular groove are mutually matched to form a wire clamp hole for fixing the overhead wire.
Preferably, the plurality of vibrating swing arms with different weights comprise a first swing arm and a second swing arm arranged adjacent to the first swing arm; be equipped with first spacing on the shaft hole terminal surface of first swing arm, be close to on the second swing arm 32 be equipped with the second spacing on the shaft hole terminal surface of first swing arm, first spacing with first spacing 312 is mutually supported, in order to restrict the turned angle of first swing arm 31 and second swing arm 32.
Preferably, the overhead conductor wide-frequency-range vibration-proof device further comprises a damper cover plate fixed at the end of the transmission shaft, each vibration swing arm is arranged between the damper cover plate and the fixed arm, and the damper cover plate, the fixed arm, each vibration swing arm and the transmission shaft are mutually matched to jointly form a closed space for accommodating the damper.
Preferably, the material of the elastic cylinder comprises rubber.
Preferably, the fixing mode of the fixing arm and the transmission shaft comprises bolt connection.
Compared with the prior art, the invention has the beneficial effects that:
the invention discloses an overhead conductor wide frequency domain vibration-proof device, which comprises: one end with the fixed arm that the air wire is connected, with the fixed arm other end is connected and with air wire vertically transmission shaft, through the shaft hole with a plurality of different weight's of transmission shaft vibration swing arm and set up in the attenuator between vibration swing arm and the transmission shaft. The vibration energy of the overhead conductor is transmitted to the transmission shaft through the fixed arm, so that the collection and the introduction of the vibration energy are realized; the vibration energy is transmitted to the plurality of vibration swing arms with different weights through the transmission shaft, so that the vibration energy is divided; the plurality of vibration swing arms with different weights are used for adapting to different vibration frequencies so as to improve the absorption efficiency of vibration energy through resonance; the damper is used for absorbing vibration energy, so that the purposes of vibration elimination and vibration prevention are achieved, and finally the vibration prevention problem of the power transmission line caused by unconventional vibration and daily breeze vibration in the repeated ice environment is effectively solved.
Drawings
Fig. 1 is a schematic structural view of an overhead conductor wide-frequency-domain anti-vibration device according to the present invention;
fig. 2 is a side view of an overhead wire wide frequency domain vibration isolation device according to the present invention;
fig. 3 is a top view of an overhead conductor wide-frequency-domain vibration isolation device according to the present invention;
fig. 4 is a wire-direction side view of an overhead wire wide-frequency-domain vibration-damping device according to the present invention;
wherein: 1-fixing arm, 2-transmission shaft, 3-vibration swing arm, 4-damper, 5-damper cover plate, 11-wire clamp cover plate, 12-wire clamp bolt, 21-positioning bulge, 22-damping partition plate, 23-shaft penetrating bolt, 31-first swing arm, 32-second swing arm, 101-wire clamp hole, 301-shaft hole, 302-positioning groove, 311-first hammer, 312-first limit, 321-second hammer and 322-second limit.
Detailed Description
The following detailed description of the embodiments is provided to facilitate the understanding of the present invention.
The overhead conductor vibration-proof device used in the ice-covered area is characterized in that the device can convert the kinetic energy of a vibrating conductor into rubber internal energy like a common vibration-proof hammer so as to consume the energy input into the conductor by wind, and simultaneously forms a nonlinear energy tank type, thereby widening the vibration-absorbing frequency range and improving the vibration-absorbing effect; and the problems that the steel strand of the damper in the ice-icing area is easy to deform under pressure and the steel strand is easy to impact and deform in the ice-shedding jumping process can be solved through rigid connection between the hammer heads.
As shown in fig. 1 to 4, the present invention discloses an overhead conductor wide frequency domain anti-vibration device, which includes: the device comprises a fixed arm 1, a transmission shaft 2, a plurality of vibrating swing arms 3 with different weights and a damper 4. Fixed arm 1's one end is used for centre gripping air wire, fixed arm 1's the other end and transmission shaft 2 fixed connection are equipped with shaft hole 301 in every vibration swing arm 3 of a plurality of different weights, every vibration swing arm 3 through shaft hole 301 with 2 rotatable coupling of transmission shaft, attenuator 4 set up in between vibration swing arm 3 and the transmission shaft 2.
The transmission shaft 2 is provided with a plurality of positioning protrusions 21 for fixing the damper, and in this embodiment, preferably, the number of the positioning protrusions 21 is 4.
Four positioning projections 21 are provided in the circumferential direction of the propeller shaft 2 so that the propeller shaft 2 forms a cross-shaped structure, and the four positioning projections 21 are used to position the four sets of dampers 4. The shaft hole 301 inboard have four with the protruding 21 corresponding constant head tank 302 that is used for fixing of location the attenuator, two adjacent location protruding 21 with one constant head tank 302 forms one and holds and fix the space of attenuator 4 when vibration swing arm 3 takes place relative rotation with transmission shaft 2, attenuator 4 receives the extrusion of vibration swing arm 3 and transmission shaft 2 and takes place compression deformation, and compression deformation's in-process turns into vibration energy heat energy to the realization lets the purpose of vibration decay. In the running process of the line, the rubber column is extruded to achieve the effect of consuming vibration energy and reducing the amplitude of the line.
The damper 4 is an elastic cylinder. The damper 4 is used for absorbing vibration energy, converting the mechanical energy of vibration into heat energy and radiating the heat energy to the environment, and the damper 4 absorbs and consumes the vibration energy to realize vibration reduction of the overhead conductor.
Preferably, the overhead conductor wide frequency domain anti-vibration comprises 2 oscillating swing arms 3 of different weights and eight dampers 4. The shaft hole 301 of each vibration swing arm 3 is provided with 4 positioning grooves 302, the transmission shaft 2 is provided with two groups of positioning components, and each group of positioning components comprises 4 positioning bulges; each damper is disposed in one of the detents 302. Eight dampers 4 and cross axle are wholly encapsulated in the airtight space that is formed jointly by the end side of fixed arm, the shaft hole of vibration swing arm and damper apron, mainly play sealed effect, protection rubber column, prevent that the material is ageing.
The plurality of vibrating swing arms 3 with different weights comprise a first swing arm 31 and a second swing arm 32, and the vibrating swing arms 3 with different weights are arranged to adapt to the vibration in different frequency ranges, so that the purpose of vibration prevention in a wide frequency range is achieved. The vibration swing arm 3 adopts a cantilever structure form that the end part is movably fixed on the transmission shaft, and a hammer head structure is fixed at the tail end of the cantilever to enhance the rotational inertia of the vibration swing arm; all be provided with on first swing arm 31 and the second swing arm 32 and be used for the cover to establish shaft hole 301 at transmission shaft 2 in order to realize rotatable coupling, first swing arm 31 is keeping away from the one end in shaft hole 301 is fixed with first tup 311, second swing arm 32 is keeping away from the one end in shaft hole 301 is fixed with second tup 321, first tup 311 and second tup 321 are the tup that weight is different, and the tup through different weight forms resonance with the circuit vibration with different vibration frequency ranges on each vibration swing arm 3 to improve the leading-in efficiency of vibration energy, and then improve the energy-absorbing damping effect of attenuator 4. In order to adapt to different types of wires and achieve better anti-vibration effect, for various types of wires, the shapes and weights of the hammers on two sides can be changed so as to better cover various vibration frequency ranges.
The vibration-proof device is similar to a common vibration-proof hammer in type and is connected with a main structure (a lead) through a wire clamp; the fixing arm 1 is provided with a wire clamp structure for fixing an overhead conductor, and the wire clamp structure comprises a semicircular groove formed in the end of the fixing arm 1, a wire clamp cover plate 11 with the same semicircular groove, and a wire clamp bolt 12 used for locking the end of the fixing arm and the wire clamp cover plate. The semicircular groove at the end of the fixing arm 1 and the wire clamp cover plate 11 are matched with each other to form a wire clamp hole 101 for fixing an overhead conductor, so that reliable connection and fixation with the overhead conductor are realized. In order to meet the design requirements of different lines and ensure the stable installation of the vibration protection device for the lines in the repeated icing area, a hinge type wire clamp or a pre-twisted wire clamp and other wire clamp types can be adopted.
The transmission shaft 2 can be a cross shaft (four sets of positioning protrusions), a Y-shaped section shaft (three sets of positioning protrusions) or a star-shaped shaft (five or more sets of positioning protrusions). The middle part of the transmission shaft 2 is provided with a damping clapboard 22 in an axial direction in a surrounding manner, and the damping clapboard is used for separating and positioning the damper 4 in the shaft hole 301 at the end part of the first swing arm 31 and the second swing arm 32 to prevent the damper 4 from generating circumferential displacement.
Preferably, the overhead conductor wide-frequency-range vibration-proof device further comprises a damper cover plate 5 fixed at the end of the transmission shaft, each vibration swing arm 3 is arranged between the damper cover plate 5 and the fixed arm 1, and the damper cover plate 5, the fixed arm 1, each vibration swing arm 3 and the transmission shaft 2 are mutually matched to jointly form a closed space for accommodating the damper 4.
Preferably, the overhead conductor wide-frequency-range vibration isolation device further comprises a shaft penetrating bolt 23 and a nut, and the shaft penetrating bolt 23 penetrates through the axis of the transmission shaft and is matched with the nut to lock the fixing arm 1, the first swing arm 31, the second swing arm 32, the transmission shaft 2, the eight groups of dampers 4 and the damping cover plate 5.
Preferably, the vibration isolator further comprises a flat gasket and a check gasket, and the flat gasket and the check gasket are arranged between the nut and the damping cover plate 5.
The material of the elastic cylinder comprises rubber.
As shown in fig. 1 and 3, the plurality of different-weight vibrating swing arms include a first swing arm 31 and a second swing arm 32 disposed adjacent to the first swing arm; be equipped with first spacing 312 on the shaft hole terminal surface of first swing arm 31, be close to on the second swing arm 32 be equipped with the spacing 322 of second on the shaft hole terminal surface of first swing arm 31, through the cooperation of first spacing 312 and first spacing 322, in order to restrict the turned angle of first swing arm 31 and second swing arm 32. The limitation of the swing amplitude between the first swing arm 31 and the second swing arm 32 is realized through the mutual matching of the first limit and the second limit, and the damage of the damper 4 or other structural parts caused by the overlarge vibration amplitude under the extreme condition is prevented. The damper 4, the transmission shaft 2 and the vibration swing arm 3 are used for replacing the traditional vibration damper steel strand structure, and a rubber damping structure is introduced, so that the linear rigidity and the damping of the traditional vibration absorption system are changed, and the problems that the vibration damper steel strand is easy to deform under pressure in a repeated ice-covered area and the steel strand is easy to impact and deform in the ice-shedding jumping process are solved. The designed vibration-proof device can absorb the vibration energy of the main structure in a wider frequency domain, and the damper 4 has larger energy absorption capacity than a steel strand cantilever structure of the existing vibration-proof hammer, and the energy consumption effect is synchronously and obviously improved.
The fixing mode of the fixing arm 1 and the transmission shaft 2 comprises bolt connection.
The invention relates to an overhead conductor vibration-proof device used for a repeated ice-covered area, which is hung on an overhead conductor through a wire clamp and is used for transmission line engineering breeze vibration-proof.
The semi-rigid connection between the overhead conductor and the hammer head is realized through the mechanical cooperation of the fixed arm, the damper and the transmission shaft; compared with a steel strand cantilever structure of a common vibration damper, the vibration damper has more stable mechanical strength, can resist strong vibration damage in overhead conductor icing and deicing jumping, and the steel strand cantilever of the conventional common vibration damper can deform and damage under the strong vibration of the deicing jumping, so that line faults and economic losses are caused, and the daily maintenance cost of lines is increased.
The invention has the following characteristics:
(1) The energy absorption capacity of the damper is large, and the energy consumption effect is obvious;
(2) The arrangement of the vibration swing arms with different weights realizes wide coverage frequency, and low-frequency, medium-frequency and high-frequency resonance can play a role in protection;
(3) The problems that the vibration damper steel strand is deformed under pressure in the repeated icing area and the steel strand is deformed by impact in the ice-shedding jumping process are solved.
(4) The additional mass is small, the adaptability is strong, and the economical efficiency is good.
(5) By adopting the vibration swing arms and the elastomer dampers with different weights, the technical effects of simple installation, good automatic activation performance and easy frequency modulation matching are realized.
The present invention is not limited to the above embodiments, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention are included in the scope of the claims of the present invention which are filed as the application.
Claims (10)
1. An overhead conductor wide frequency domain vibration isolation device, characterized in that the device comprises: the device comprises a fixed arm, a transmission shaft, a plurality of vibration swing arms with different weights and a damper; one end of the fixed arm is used for clamping an overhead conductor, and the other end of the fixed arm is connected with the transmission shaft; each of the plurality of different-weight vibration swing arms is provided with a shaft hole, and each of the plurality of different-weight vibration swing arms is movably sleeved on the transmission shaft through the shaft hole; the damper is arranged between the vibration swing arm and the transmission shaft.
2. The overhead conductor line-width-domain vibration damping device according to claim 1, wherein a plurality of positioning protrusions are provided at intervals on an axial side surface of said transmission shaft; the positioning bulge is used for fixing the positioning bulge of the damper.
3. The overhead wire wide frequency domain vibration isolator as claimed in claim 2, wherein a plurality of positioning grooves for fixing the damper are circumferentially distributed inside the shaft hole, and the positioning grooves and two adjacent positioning protrusions on the transmission shaft together form a space for accommodating and fixing the damper.
4. An overhead wire wide frequency domain vibration isolator as claimed in any one of claims 1 to 3, wherein said damper is an elastic cylinder in limit contact with said oscillating arm and said drive shaft, respectively.
5. An overhead conductor wide frequency domain vibration damping device as defined in claim 1, wherein said oscillating arm has a hammer head fixed to an end thereof remote from said axial hole, each of said oscillating arms having a different hammer head.
6. The overhead conductor wide frequency domain vibration damping device according to claim 1, wherein one end of said fixing arm has a wire clamp structure for fixing the overhead conductor, said wire clamp structure comprising a semicircular groove of the end of the fixing arm, a wire clamp cover plate having the same semicircular groove, and a wire clamp bolt for locking said end of the fixing arm with said wire clamp cover plate; the semicircular groove at the end part of the fixing arm and the wire clamp cover plate with the same semicircular groove are mutually matched to form a wire clamp hole for fixing the overhead wire.
7. An overhead wire wide frequency domain vibration isolator as claimed in claim 1, wherein said plurality of oscillating swing arms of different weights comprises a first swing arm and a second swing arm disposed adjacent to said first swing arm; be equipped with first spacing on the shaft hole terminal surface of first swing arm, be close to on the second swing arm 32 be equipped with the second spacing on the shaft hole terminal surface of first swing arm, first spacing with first spacing 312 is mutually supported, in order to restrict the turned angle of first swing arm 31 and second swing arm 32.
8. An overhead conductor wide-frequency-domain vibration isolator as claimed in claim 1, further comprising a damper cover plate fixed to an end of the transmission shaft, wherein each vibration swing arm is disposed between the damper cover plate and the fixed arm, and the damper cover plate, the fixed arm, each vibration swing arm and the transmission shaft cooperate to form a closed space for accommodating the damper.
9. The overhead conductor wide frequency domain vibration isolator as claimed in claim 4, wherein a material of said elastic cylinder includes rubber.
10. The overhead conductor wide frequency domain vibration damping device according to claim 1, wherein said fixing arm is fixed to said transmission shaft by means including a bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211268628.0A CN115621953A (en) | 2022-10-17 | 2022-10-17 | Overhead conductor wide-frequency-domain vibration-proof device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211268628.0A CN115621953A (en) | 2022-10-17 | 2022-10-17 | Overhead conductor wide-frequency-domain vibration-proof device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115621953A true CN115621953A (en) | 2023-01-17 |
Family
ID=84861885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211268628.0A Pending CN115621953A (en) | 2022-10-17 | 2022-10-17 | Overhead conductor wide-frequency-domain vibration-proof device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115621953A (en) |
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2022
- 2022-10-17 CN CN202211268628.0A patent/CN115621953A/en active Pending
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